System for bi-directional video signal transmission

Details System for bi-directional video signal transmission System for bi-directional video signal transmission

2005-07-05

2005-07-05

Lamarre, Guy J. (Department: 2133)

Computer graphics processing and selective visual display system

Display driving control circuitry

C326S036000, C326S086000

Reexamination Certificate

active

06914597

ABSTRACT:
A bi-directional high speed video data transmission system. A transmitter transmits an encoded video data stream across a data pair to a receiver by switching a DC current, via a pair of transistors, across the two data lines comprising the data pair. As the current varies on the data lines, so too does the voltage. The receiver decodes the serial video data stream back into its component parts so that the video data may be displayed by an appropriate display device. A pair of summing resistors adds the AC currents seen across the data lines to reconstruct the original DC current as a DC return current. The DC return current may be used to drive a return transmitter located on the original receiving side in order to send video data to the original transmitting side of the bi-directional video data transmission system.

REFERENCES:
patent: 5553064 (1996-09-01), Paff et al.
patent: 5781028 (1998-07-01), Decuir
patent: 5974199 (1999-10-01), Lee et al.
patent: 6366130 (2002-04-01), Podlesny et al.
patent: 6564269 (2003-05-01), Martin

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